[Bluetooth] c4d74dc565: suspend_stress.fail

FYI, we noticed the following commit (built with gcc-7):

commit: c4d74dc565f9d40044f4cf04fd6e11301517be49 ("[RFC PATCH 2/2] Bluetooth: Handle PM_SUSPEND_PREPARE and PM_POST_SUSPEND")
url: https://github.com/0day-ci/linux/commits/Abhishek-Pandit-Subedi/Bluetooth-Handle-system-suspend-gracefully/20200118-111647
base: https://git.kernel.org/cgit/linux/kernel/git/bluetooth/bluetooth-next.git master

in testcase: suspend_stress
with following parameters:

	mode: freeze
	iterations: 10



on test machine: 8 threads KabyLake-r with 8G memory

caused below changes (please refer to attached dmesg/kmsg for entire log/backtrace):


If you fix the issue, kindly add following tag
Reported-by: kernel test robot <redacted>


SUSPEND RESUME TEST STARTED
Suspend to freeze 1/10:
/usr/bin/wget -q --timeout=1800 --tries=1 --local-encoding=UTF-8 http://inn:80/~lkp/cgi-bin/lkp-jobfile-append-var?job_file=/lkp/jobs/scheduled/lkp-kblr-hp1/suspend_stress-10-freeze-debian-x86_64-20180403.cgz-c4d74dc565f9d40044f4cf04fd6e11301517be49-20200308-50604-1gonea0-0.yaml&job_state=suspending-1/10 -O /dev/null
Failed



To reproduce:

        git clone https://github.com/intel/lkp-tests.git
        cd lkp-tests
        bin/lkp install job.yaml  # job file is attached in this email
        bin/lkp run     job.yaml



Thanks,
Rong Chen